---
title: "Connect your AI assistant to Fast GST Refund"
seoTitle: "GST MCP server: connect Fast GST Refund"
description: "Connect to the free GST preparation tools, get your first checklist and check a receipt allocation, with settings and expected results."
topic: "Connect an AI assistant"
published: 2026-10-01
checked: 2026-10-02
order: 31
updated: 2026-10-02
---

Connect Fast GST Refund to your AI assistant to get a preparation checklist, find a cited guide, or check how receipts cover invoices. The connection is free and requires no Fast GST Refund account or API key.

You need an assistant that supports remote Model Context Protocol (MCP) connections. If you use Codex, follow the [plugin installation guide](/guides/gst-refund-codex-plugin/).

## Add the connection

1. Open your assistant's MCP connection settings and add a remote server:

   | Setting                 | Value                           |
   | ----------------------- | ------------------------------- |
   | Name                    | Fast GST Refund                 |
   | Server URL              | `https://fastgstrefund.com/mcp` |
   | Transport, if requested | Streamable HTTP                 |
   | Authentication          | No sign-in or API key           |

2. Save the connection and enable its tools. Start a new chat if your assistant loads connections at the start of a conversation.
3. Confirm that these five tools appear:

   | Tool                       | Use it to                                                                  |
   | -------------------------- | -------------------------------------------------------------------------- |
   | `get_refund_checklist`     | Get the records and checks for your preparation stage.                     |
   | `search_refund_guides`     | Find a Fast GST Refund guide by topic.                                     |
   | `read_refund_guide`        | Read the selected guide and its source links.                              |
   | `explain_upload_error`     | Get troubleshooting steps for a supported Statement 3 or Annexure B issue. |
   | `check_receipt_allocation` | Calculate invoice and receipt balances and flag allocation errors.         |

MCP lets the assistant discover and call these tools. See the [official MCP introduction](https://modelcontextprotocol.io/docs/learn/architecture) for the connection standard.

## Get your first checklist

Ask:

> Use Fast GST Refund to get a Statement 3 preparation checklist. I export software services under LUT. What records should I gather and what should I check?

The result should list the records, checks and relevant guides. Expand your assistant's tool activity and look for `get_refund_checklist` to confirm it used the connection.

To work through the records, follow up with:

> Find and read the Statement 3 worked example. Explain how one bank receipt is allocated across several invoices.

Compare the answer with the tables in the [Statement 3 example](/guides/statement-3-worked-example/).

## Get help with an upload issue

Name the statement and the problem. For example:

> Use Fast GST Refund to explain what to check when Statement 3 will not generate JSON.

Or:

> Use Fast GST Refund to explain the duplicate-document check in Annexure B.

The tool returns checks for that issue and the [upload-error guide](/guides/gst-refund-json-upload-errors/). Apply them to your current utility and its exact validation message.

## Check a receipt allocation

Try these fictional figures:

> Use Fast GST Refund to check these anonymous allocations. Invoice row 1 is ₹5,000, invoice row 2 is ₹8,000, and receipt row 1 is ₹10,000. I allocated ₹5,000 from that receipt to each invoice. Show the remaining balances in rupees.

The expected result is **₹0 outstanding on invoice 1**, **₹3,000 outstanding on invoice 2** and **₹0 left in the receipt**. Review invoice 2 for the outstanding ₹3,000.

If you instead allocate ₹13,000 from the same ₹10,000 receipt, the check flags a ₹3,000 excess. Use the result to correct your allocation working.

For your own figures, use row numbers and keep the mapping to original documents locally. The remote check receives those row numbers and amounts. Keep GSTINs, invoice numbers, bank references and credentials out of tool inputs. The [free preparation pack](/preparation-pack/) supplies working templates and an offline checker.

## Resolve a connection problem

Check the URL and transport, then refresh the tools or start a new chat. Use the prompts in the connected assistant; opening `/mcp` in a browser does not run a check.

For a rate-limit response, wait for the retry interval. If the problem continues, send [support](/support/) the assistant name, tool name, approximate time and request ID shown. The [privacy notice](/privacy/) explains request handling and the analytics opt-out.